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Alfonso de la Rocha

Research Engineer

Education

MSc in Network Services and Systems, 2017

KTH Royal Institute of Technology

MSc in Telecommunication Engineering, 2017

Universidad Politécnica de Madrid

BSc in Telecommunication Engineering, 2014

Universidad Politécnica de Madrid

Before joining Protocol Labs, Alfonso worked as a blockchain expert at Telefónica R&D, where he was responsible for the design and development of core technology based on blockchains, distributed systems, and advanced cryptography. Alfonso’s involvement in research and development began at Universidad Politécnica de Madrid, where he worked on topics related to energy efficiency in data centers. His broad R&D experience also includes research into the compression efficiency of video coding standards at Ericsson Research and projects related to securing interdomain routing protocols at KTH Royal Institute of Technology in Stockholm.

Alfonso is also an avid reader and basketball lover.

Areas of Expertise

Distributed Systems, Networking, Cryptography

Latest work

2021.1.14 / Publications

Accelerating Content Routing with Bitswap: A multi-path file transfer protocol in IPFS and Filecoin

Bitswap is a Block Exchange protocol designed for P2P Content Addressable Networks. It leverages merkle-linked graphs in order to parallelize retrieval and verify content integrity. Bitswap is being used in the InterPlanetary File System architecture as the main content exchange protocol, as well as in the Filecoin network as part of the block synchronisation protocol.

2021.1.11 / Posts

Beyond Swapping Bits: project review (and preview!)

If you have been following along for the past three months (1, 2, 3, 4), you know that we in ResNetLab started the Beyond Bitswap project with one goal in mind: to drive speed-ups for file-sharing in IPFS.

2021.1.1 / Posts

Our Bitswap nodes have become “jumping inspectors” (updated)

A few weeks ago, we shared how we have taught our Bitswap nodes to jump. If you recall from that post, the content discovery range extension gained came at the expense of an increased number of duplicate blocks exchanged in the network.

2020.12.10 / Posts

Teaching Bitswap nodes to jump

By now you may have heard about ResNetLab’s research endeavour to drive speed-ups on file transfers: Beyond Swapping Bits. Our recent blog post, “Honey, I shrunk our libp2p streams”, considers how adding compression to libp2p could lead to significant bandwidth savings.

2020.11.25 / Posts

IEEE/IFIP CNSM 2020 - The InterPlanetary File System and the Filecoin Network

ResNetLab was invited to present a 3.5 hour tutorial at one of the biggest conferences in the “NetMan” community, the 16th International Conference on Network and Service Management. We were impressed by the quality of talks, keynotes, workshops, and tutorials presented during the conference.

2020.11.3 / Posts

"Two ears, one mouth": how to leverage bitswap chatter for faster transfers

As part of ResNetLab’s research endeavour to drive speed-ups on file transfers, Beyond Swapping Bits, we present a new contribution to IPFS Bitswap protocol. We argue that Bitswap is currently discarding a wealth of information that could be used to its benefit, improving retrieval success and minimizing the latency to retrieve content.

2020.10.29 / Posts

Honey, I shrunk our libp2p streams

Today we’re excited to share the story of how we decided to explore compression for libp2p streams and ended up achieving up to a 75% decrease in bandwidth use when performing an IPFS file exchange.